Results 191 to 200 of about 13,641 (263)

Experimental Constraint on Ca‐Rich Carbonatite Melt‐Peridotite Interaction and Implications for Lithospheric Mantle Modification Beneath the North China Craton

Journal of Geophysical Research: Solid Earth, 2022
Melt‐peridotite interaction is the key process causing lithological and mineralogical modification in the lithospheric mantle beneath the North China Craton (NCC). However, the lithology, kinetic, mineral, and melt compositional variations of carbonatite
X. Wang, J. Zhang, C. Wang, K. Zong, H. Xu   +4 more
semanticscholar   +1 more source

AN UNUSUAL EARLY EOCENE, SYNCOLLISIONAL CARBONATITE COMPLEX AND RELATED RARE EARTH ELEMENT DEPOSIT IN THE INDIA-ASIA COLLISION ZONE, NORTHWESTERN VIETNAM

Economic Geology, 2022
Carbonatite-related rare earth element (REE) deposits, the most significant source of REEs globally, are normally generated in extensional settings, such as intracontinental rifts, mantle plume-related environments, or postcollisional orogens ...
Xiaochun Li, Mei‐Fu Zhou, Shi-Hu Li, Xiao-Ran Zhang, H. Fan, D. Groves, Ngo Xuan Dac   +6 more
semanticscholar   +1 more source

Fingerprinting REE mineralization and hydrothermal remobilization history of the carbonatite-alkaline complexes, Central China: Constraints from in situ elemental and isotopic analyses of phosphate minerals

American Mineralogist, 2021
Carbonatites and related alkaline rocks host most REE resources. Phosphate minerals, e.g., apatite and monazite, commonly occur as the main REE-host in carbonatites and have been used for tracing magmatic and mineralization processes.
Jian-Hui Su, Xin-Fu Zhao, Xiaochun Li, Zhi-Kun Su, Rui Liu, Zhiruo Qin, Mi Chen   +6 more
semanticscholar   +1 more source

Hydrothermal upgrading as an important tool for the REE mineralization in the Miaoya carbonatite-syenite complex, Central China

American Mineralogist, 2021
Secondary hydrothermal reworking of REEs has been widely documented in carbonatites/alkaline rocks, but its potential role in the REE mineralization associated with these rocks is currently poorly understood.
Rongtu Ma, W. Chen, Wei Zhang, Youwei Chen   +3 more
semanticscholar   +1 more source

Burbankite and pseudomorphs from the Main Intrusion calcite carbonatite, Lofdal, Namibia: association, mineral composition, Raman spectroscopy

Mineralogical magazine, 2021
The Neoproterozoic Lofdal alkaline carbonatite complex consists of a swarm of carbonatite dykes and two plugs of calcite carbonatite known as the ‘Main’ and ‘Emanya’ carbonatite intrusions, with associated dykes and plugs of phonolite, syenite, rare ...
M. Sitnikova, Vicky Do Cabo, F. Wall, S. Goldmann   +3 more
semanticscholar   +1 more source

A common origin of carbonatite magmas

Geology, 2017
The more than 500 fossil Ca-carbonatite occurrences on Earth are at odds with the only active East African Rift carbonatite volcano, Oldoinyo Lengai (Tanzania), which produces Na-carbonatite magmas.
Daniel Weidendorfer, Max W Schmidt, Hannes B Mattsson   +2 more
exaly   +2 more sources

CARBONATITES AND CARBONATITES AND CARBONATITES

The Canadian Mineralogist, 2005
Le clan des carbonatites est ici redefini dans le contexte d'une classification mineralogique et genetique, et subdivise en deux groupes: carbonatites primaires et residus carbothermaux. On souligne le fait que "carbonatite" est a la fois un terme petrographique applicable a un type de roche particulier, et un terme faisant reference a un groupe de ...
openaire   +1 more source

Giant Rare Earth Element Accumulation Related to Voluminous, Highly Evolved Carbonatite: A Microanalytical Study of Carbonate Minerals From the Bayan Obo Deposit, China

Economic Geology
The giant Bayan Obo deposit in China represents the largest rare earth element (REE) resource in the world, but the mechanisms for its highly anomalous REE enrichment have long been controversial.
Xiaochun Li, H. Fan, Jian-Hui Su, David I. Groves, Kui-Feng Yang, Xin-Fu Zhao   +5 more
semanticscholar   +1 more source

The Primary Geology of the Paleoproterozoic MT Weld Carbonatite Complex, Western Australia

Journal of Petrology
The paleoregolith overlying the c. 2.06 Ga Mt Weld carbonatite (eastern Yilgarn Craton, Western Australia) hosts one of the largest Rare Earth Element (REE) deposits globally.
Ross Chandler, Ganesh Bhat, J. Mavrogenes, Brad Knell, Rhiannon David, Thomas Leggo   +5 more
semanticscholar   +1 more source

Compositional variation and genesis of pyrochlore, belkovite and baotite from the Sevattur carbonatite complex, India

Mineralogical magazine, 2021
Pyrochlore-group minerals are common in the Neoproterozoic Sevattur carbonatite complex. This complex is composed of dolomite-, calcite-, banded- and blue carbonatite together with pyroxenite, albitite and diverse syenites.
Monojit Dey, S. Bhattacharjee, A. Chakrabarty, R. Mitchell, S. Pal, Supratim Pal, A. K. Sen   +6 more
semanticscholar   +1 more source